It's not a matter of money, you don't park all your acft just to repaint them
Well, I was joking about the money, you know. AC
's paint shop is in YYZ
, and the aircraft are normally painted after they've been through heavy maintenance - in the case of the A320, mostly done in YWG
I don't know when they're going to start painting A320's in the new scheme, though I assume it'll be soon. Almost all of the A320 series has been painted within the last two or three years, so it'll be a long time before the old scheme is gone.
The primary function of the design engineer is to make things difficult for the manufacturer and impossible for the AME.